HackMD
* means important problem
Solve all stared problem should give you the ability to solve similar ones
Bruteforce
- CSES - Creating Strings*
- CSES - Apple Division*
- AtCoder Beginner Contest 190C - Bowls and Dishes
- AtCoder Beginner Contest 197C - ORXOR
- Codeforces 812B - Sagheer, the Hausmeister
- Codeforces 244B - Undoubtedly Lucky Numbers
Backtracking & Pruning
- UVA Online Judge 989 - Sudoku*
- CSES - Chessboard and Queens*
- CSES - Grid Paths*
- AtCoder Beginner Contest 211 E - Red Polyomino
- AtCoder Beginner Contest 199 D - RGB Coloring 2
Two Pointers
- CSES - Playlist*
- CSES - Subarray Distinct Values*
- CSES - Sum of Three Values*
- Codeforces EDU Two Pointers - Looped Playlist
- Codeforces 1073C - Vasya and Robot
- Codeforces 616D - Longest k-Good Segment
If you have time, try solving all the practice problems of Codeforces EDU Two pointers
You will be really familar with two pointers after solving those.
Basic Binary Search
- Codeforces - Guess the Number*
- Codeforces EDU Binary Search - Closest to the Left*
- Codeforces EDU Binary Search - Fast Search*
Binary Search on Answers / Minimax
- CSES - Factory Machines*
- Codeforces EDU Binary Search - Ropes*
- Codeforces EDU Binary Search - String Game*
- Codeforces EDU Binary Search - Children Holiday*
- Codeforces EDU Binary Search - Student Councils*
- Codeforces EDU Binary Search - Student Councils*
- Codeforces EDU Binary Search - Get Together*
- Codeforces EDU Binary Search - Cows in Stalls*
- AtCoder Beginner Contest 212 C - Min Difference
- Codeforces 1059D - Nature Reserve
Binary Search on Average / Median
- Codeforces EDU Binary Search - Pair Selection*
- Codeforces EDU Binary Search - Maximum Average Segment*
- Codeforces 1201C - Max Median
Binary Search on Kth Element
- Codeforces EDU Binary Search - K-th Number in the Union of Segments*
- Codeforces EDU Binary Search - Multiplication Table*
- Codeforces EDU Binary Search - K-th Sum*
If you have time, try to solve all of Codeforces EDU Binary Search. You will be really good at it.
